Optical Gain of Phototransistor Calculator

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C-V Actions of Optics Transmission

Fiber Optic Parameters

Optical Detectors

Transmission Measurements

✖Quantum Efficiency represents the probability that a photon incident on the photodetector will generate an electron-hole pair, leading to a photocurrent.ⓘ Quantum Efficiency [η]			+10% -10%
✖Common Emitter Current Gain is the gain in common emitter circuit which is obtained from the base and the collector circuit currents.ⓘ Common Emitter Current Gain [h_FE]			+10% -10%

✖Optical Gain of Phototransistor is a measure of how well a medium amplifies photons by stimulated emission.ⓘ Optical Gain of Phototransistor [G_O]

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Formula

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Optical Gain of Phototransistor

Formula

`"G"_{"O"} = "η"*"h"_{"FE"}`

Example

`"0.15"="0.3"*"0.5"`

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Optical Gain of Phototransistor Solution

STEP 0: Pre-Calculation Summary

Formula Used

Optical Gain of Phototransistor = Quantum Efficiency*Common Emitter Current Gain
G_O = η*h_FE
This formula uses 3 Variables

Variables Used

Optical Gain of Phototransistor - Optical Gain of Phototransistor is a measure of how well a medium amplifies photons by stimulated emission.
Quantum Efficiency - Quantum Efficiency represents the probability that a photon incident on the photodetector will generate an electron-hole pair, leading to a photocurrent.
Common Emitter Current Gain - Common Emitter Current Gain is the gain in common emitter circuit which is obtained from the base and the collector circuit currents.

STEP 1: Convert Input(s) to Base Unit

Quantum Efficiency: 0.3 --> No Conversion Required
Common Emitter Current Gain: 0.5 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

G_O = η*h_FE --> 0.3*0.5

Evaluating ... ...

G_O = 0.15

STEP 3: Convert Result to Output's Unit

0.15 --> No Conversion Required

FINAL ANSWER

0.15 <-- Optical Gain of Phototransistor

(Calculation completed in 00.004 seconds)

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Credits

Created by Simran Shravan Nishad

Sinhgad College Of Engineering (SCOE), Pune

Simran Shravan Nishad has created this Calculator and 25+ more calculators!

Verified by Parminder Singh

Chandigarh University (CU), Punjab

Parminder Singh has verified this Calculator and 600+ more calculators!

< 17 C-V Actions of Optics Transmission Calculators

Noise Equivalent Power

Go Noise Equivalent Power = [hP]*[c]*sqrt(2*Charge Of Particles*Dark Current)/(Quantum Efficiency*Charge Of Particles*Wavelength of Light)

Passband Ripple

Go Passband Ripple = ((1+sqrt(Resistance 1*Resistance 2)*Single Pass Gain)/(1-sqrt(Resistance 1*Resistance 2)*Single Pass Gain))^2

ASE Noise Power

Go ASE Noise Power = Mode Number*Spontaneous Emission Factor*(Single Pass Gain-1)*([hP]*Frequency Of Incident Light)*Post Detection Bandwidth

Noise Figure given ASE Noise Power

Go Noise Figure = 10*log10(ASE Noise Power/(Single Pass Gain*[hP]*Frequency Of Incident Light*Post Detection Bandwidth))

Output Photo Current

Go Photocurrent = Quantum Efficiency*Incident Optical Power*[Charge-e]/([hP]*Frequency Of Incident Light)

Peak Parametric Gain

Go Peak Parametric Gain = 10*log10(0.25*exp(2*Fiber Non Linear Coefficient*Pump Signal Power*Fiber Length))

Responsivity with reference of Wavelength

Go Responsivity of Photodetector = (Quantum Efficiency*[Charge-e]*Wavelength of Light)/([hP]*[c])

Total Shot Noise

Go Total Shot Noise = sqrt(2*[Charge-e]*Post Detection Bandwidth*(Photocurrent+Dark Current))

Responsivity in relation to Photon Energy

Go Responsivity of Photodetector = (Quantum Efficiency*[Charge-e])/([hP]*Frequency Of Incident Light)

Thermal Noise Current

Go Thermal Noise Current = 4*[BoltZ]*Absolute Temperature*Post Detection Bandwidth/Resistivity

Gain Coefficient

Go Net Gain Coefficient Per Unit Length = Optical Confinement Factor*Material Gain Coefficient-Effective Loss Coefficient

Junction Capacitance of Photodiode

Go Junction Capacitance = Permittivity of Semiconductor*Junction Area/Depletion Layer Width

Dark Current Noise

Go Dark Current Noise = 2*Post Detection Bandwidth*[Charge-e]*Dark Current

Load Resistor

Go Load Resistance = 1/(2*pi*Post Detection Bandwidth*Capacitance)

Optical Gain of Phototransistor

Go Optical Gain of Phototransistor = Quantum Efficiency*Common Emitter Current Gain

PhotoConductive Gain

Go PhotoConductive Gain = Slow Carrier Transit Time/Fast Carrier Transit Time

Responsivity of Photodetector

Go Responsivity of Photodetector = Photocurrent/Incident Power

Optical Gain of Phototransistor Formula

Optical Gain of Phototransistor = Quantum Efficiency*Common Emitter Current Gain
G_O = η*h_FE

Do you know where are phototransistors used ?

Phototransistors are used in opto-isolators, photointerrupters, proximity detectors and incremental encoders.

How to Calculate Optical Gain of Phototransistor?

Optical Gain of Phototransistor calculator uses Optical Gain of Phototransistor = Quantum Efficiency*Common Emitter Current Gain to calculate the Optical Gain of Phototransistor, The Optical Gain of Phototransistor is a measure of how well a medium amplifies photons by stimulated emission. Optical Gain of Phototransistor is denoted by G_O symbol.

How to calculate Optical Gain of Phototransistor using this online calculator? To use this online calculator for Optical Gain of Phototransistor, enter Quantum Efficiency (η) & Common Emitter Current Gain (h_FE) and hit the calculate button. Here is how the Optical Gain of Phototransistor calculation can be explained with given input values -> 0.15 = 0.3*0.5.

FAQ

What is Optical Gain of Phototransistor?

The Optical Gain of Phototransistor is a measure of how well a medium amplifies photons by stimulated emission and is represented as G_O = η*h_FE or Optical Gain of Phototransistor = Quantum Efficiency*Common Emitter Current Gain. Quantum Efficiency represents the probability that a photon incident on the photodetector will generate an electron-hole pair, leading to a photocurrent & Common Emitter Current Gain is the gain in common emitter circuit which is obtained from the base and the collector circuit currents.

How to calculate Optical Gain of Phototransistor?

The Optical Gain of Phototransistor is a measure of how well a medium amplifies photons by stimulated emission is calculated using Optical Gain of Phototransistor = Quantum Efficiency*Common Emitter Current Gain. To calculate Optical Gain of Phototransistor, you need Quantum Efficiency (η) & Common Emitter Current Gain (h_FE). With our tool, you need to enter the respective value for Quantum Efficiency & Common Emitter Current Gain and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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